MRF899

2

MOTOROLA RF DEVICE DATA

Characteristic

Symbol

Min

Typ

Max

Unit

FUNCTIONAL CHARACTERISTICS

Common–Emitter Amplifier Power Gain

VCC = 26 Vdc, Pout = 150 Watts (PEP), Icq = 300 mA, f1 = 900 MHz,

f2 = 900.1 MHz

Gpe

8.0

9.0

—

dB

Collector Efficiency

VCC = 26 Vdc, Pout = 150 Watts (PEP), Icq = 300 mA, f1 = 900 MHz,

f2 = 900.1 MHz

η

30

40

—

%

3rd Order Intermodulation Distortion

VCC = 26 Vdc, Pout = 150 Watts (PEP), Icq = 300 mA, f1 = 900 MHz,

f2 = 900.1 MHz

IMD

—

–32

–28

dBc

Output Mismatch Stress

VCC = 26 Vdc, Pout = 150 Watts (PEP), Icq = 300 mA, f1 = 900 MHz,

f2 = 900.1 MHz, VSWR = 5:1 (all phase angles)

ψ

No Degradation in Output Power

Before and After Test

Figure 1. 900 MHz Power Gain Test Circuit

B1, B2 — Ferrite Bead, Ferroxcube #56–590–65–3B

C1, C2, C24, C25 — 43 pF, B Case, ATC Chip Capacitor

C3, C4, C20, C21 — 100 pF, B Case, ATC Chip Capacitor

C5, C6, C12, C13 — 1000 pF, B Case, ATC Chip Capacitor

C7, C8, C14, C15 — 1800 pF, AVX Chip Capacitor

C9 — 9.1 pF, A Case, ATC Chip Capacitor

C10, C11, C17, C18, C22, C23 — 10

µF, Electrolytic Capacitor

Panasonic

C16 — 3.9 pF, B Case, ATC Chip Capacitor

C19 — 0.8 pF, B Case, ATC Chip Capacitor

C26 — 200

µF, Electrolytic Capacitor Mallory Sprague

C27 — 500

µF Electrolytic Capacitor

L1 — 5 Turns 24 AWG IDIA 0.059

″ Choke, 19.8 nH

L2, L3, L7, L9 — 4 Turns 20 AWG IDIA 0.163

″ Choke

L4, L5, L6, L8 — 12 Turns 22 AWG IDIA 0.140

″ Choke

N1, N2 — Type N Flange Mount, Omni Spectra

Q1 — Bias Transistor BD136 PNP

R2, R3, R4, R5 — 4.0 x 39 Ohm 1/8 W Chips in Parallel

R1a, R1b — 56 Ohm 1.0 W

TL1 – TL8 — See Photomaster

Balun1, Balun2, Coax 1, Coax 2 — 2.20

″ 50 Ohm 0.088″ o.d.

Board — 1/32

″ Glass Teflon, εr = 2.55″ Arlon (GX–0300–55–22)

COAX 1

BALUN 1

INPUT

OUTPUT

TL1

C1

C2

L1

TL2

R1a

VBB

VBB

VCC

VB

R1b

L2

B1

L4

R2

C3

TL3

TL4

C9

D.U.T.

L5

R3

C4

+

C26

VB

Q1

C6

C8

C11

+

++

C27

C15

C13

C18

R4

L8

C21

C23

TL8

L9

L7

C25

C19

C16

TL5

TL6

C24

TL7

BALUN 2

COAX 2

C22

C20

L6

R3

C17

C14

C12

C10

C7

C5

L3

B2

VCC

+